TypeError: Cannot read property 'forEach' of undefined at ABTest.createABTestMap (ab_test.js:61:5) at ABTest.getVariantModel (ab_test.js:66:31) at ABTest.getVariant (ab_test.js:70:29) at Navigation.getAbTestVariants (navigation.js:64:22) at Navigation.render (navigation.js:75:32) at [object Object].ReactCompositeComponent._renderValidatedComponentWithoutOwnerOrContext (/mnt/rails/hackerrank/rails4/node_modules/react-dom/lib/ReactCompositeComponent.js:799:30) at [object Object].ReactCompositeComponent._renderValidatedComponent (/mnt/rails/hackerrank/rails4/node_modules/react-dom/lib/ReactCompositeComponent.js:822:32) at [object Object].ReactCompositeComponent.performInitialMount (/mnt/rails/hackerrank/rails4/node_modules/react-dom/lib/ReactCompositeComponent.js:362:30) at [object Object].ReactCompositeComponent.mountComponent (/mnt/rails/hackerrank/rails4/node_modules/react-dom/lib/ReactCompositeComponent.js:258:21) at Object.ReactReconciler.mountComponent (/mnt/rails/hackerrank/rails4/node_modules/react-dom/lib/ReactReconciler.js:46:35)